chronometryPronunciation: /krəˈnɒmɪtri/Definition of chronometry noun [mass noun] the science of accurate time measurement. Derivatives chronometricPronunciation: /krɒnəˈmɛtrɪk/ adjective chronometricalPronunciation: /krɒnəˈmɛtrɪk(ə)l/ adjective chronometricallyPronunciation: /krɒnəˈmɛtrɪk(ə)li/ adverb chronometry in other Oxford dictionaries Definition of chronometry in the US English dictionary